package com.neuedu.config;

import com.neuedu.common.JacksonObjectMapper;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;


import java.util.List;

@Slf4j
@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport{

    @Value("${neuedu_mall.path}${neuedu_mall.imgpath}")
    private String imgpath;

    /**
     * 设置静态资源映射
     * @param registry
     */
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        //重写方法，修改Tomcat虚拟映射
        registry.addResourceHandler("/img/**")
                .addResourceLocations("file:" + imgpath);
//        registry.addResourceHandler("/backend/**").addResourceLocations("classpath:/backend/");
//        registry.addResourceHandler("/front/**").addResourceLocations("classpath:/front/");
        log.info("静态资源加载完成...");
    }

    /**
     * 扩展mvc框架的消息转换器
     * @param converters
     */
    @Override
    protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {

        log.info("扩展消息转换器...");
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();

        //设置对象转换器，底层使用Jackson将java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());

        //将上面的消息转换器对象追加到mvc框架消息转换器集合中
        converters.add(0, messageConverter);
    }
}
